Sphygmomanometer



FIG. 1 is a top plan view of a sphygmomanometer showing my new design;

FIG. 2 is a left side elevation;

FIG. 3 is a front view;

FIG. 4 is a perspective view from the right upper side; and

FIG. 5 is a perspective view from the left lower side. 

The ornamental design for a sphygmomanometer, or similar article, substantially as shown and described. 